217239102 has 12 divisors (see below), whose sum is σ = 470684760. Its totient is φ = 72413028.

The previous prime is 217239101. The next prime is 217239193. The reversal of 217239102 is 201932712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217239101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6034402 + ... + 6034437.

It is an arithmetic number, because the mean of its divisors is an integer number (39223730).

Almost surely, 2^217239102 is an apocalyptic number.

217239102 is an abundant number, since it is smaller than the sum of its proper divisors (253445658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217239102 is a wasteful number, since it uses less digits than its factorization.

217239102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12068847 (or 12068844 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 217239102 is about 14739.0332790180. The cubic root of 217239102 is about 601.1451297394.

It can be divided in two parts, 2 and 17239102, that added together give a square (17239104 = 4152²).

The spelling of 217239102 in words is "two hundred seventeen million, two hundred thirty-nine thousand, one hundred two".